Two identical containers A and B with frictionless pistons contain the same ideal gas at the same temperature and the same volume V. The mass of the gas in A is mA, and that in B is mB. The gas in each cylinder is now allowed to expand isothermally to the same final volume 2V. The changes in the pressure in A and B are found to be ΔP and 1.5ΔP respectively. Then
a. 4mA=9mB
b. 2mA=3mB
c. 3mA=2mB
d. 9mA=4mB